Fan heat sink and method
Heat sink assembly with fixing members
Heat dissipation assembly
Radiator with airflow guiding structure
Heat dissipating device
Heat dissipation device assembly
Heat dissipating device having a fin also functioning as a fan duct Patent #: 7215548
ApplicationNo. 11308772 filed on 05/02/2006
US Classes:361/695, Fan or blower361/696, With heat exchanger unit361/697, With heat sink or cooling fins165/80.3, Air cooled, including fins165/104.33, Cooling electrical device415/177, INCLUDING HEAT INSULATION OR EXCHANGE MEANS (E.G., FINS, LAGGING, ETC.)415/213.1, Casing with mounting means361/825, Support brackets361/703With cooling fins
ExaminersPrimary: Dalskovsky, Michael
Attorney, Agent or Firm
International ClassH05K 7/20
FIELD OF THE INVENTION
The present invention relates generally to a heat dissipation device, and more particularly to a heat dissipation device incorporating with a fan for dissipating heat generated by an electronic device. The heat dissipation device has a fanholder for attachment of the fan.
DESCRIPTION OF RELATED ART
It is well known that during operation of a computer electronic devices such as central processing units (CPUs) can generate large amounts of heat. The heat must be quickly removed from the electronic device to prevent it from becoming unstableor being damaged. Typically, a heat sink is attached to an outer surface of the electronic device to absorb heat from the electronic device, and the heat absorbed by the heat sink is then dissipated to ambient air.
Generally, in order to improve heat dissipation efficiency of a heat sink, a fan is desired to provided forced airflow to the heat sink. Usually, the fan is mounted to the heat sink by a fan holder attached to the heat sink. Conventionally, theheat sink mainly comprises a heat conducting base contacting a heat generating electronic device and a plurality of heat dissipating fins extending from one face of the base. A plurality of screw threads is formed in two outermost fins at each side ofthe heat sink. The fan holder defines a plurality of fixing apertures corresponding to the screw threads of the heat sink. Pluralities of screws are engaged in the fixing apertures of the fan holder and the screw threads of the heat sink, therebyfastening the fan holder to the heat sink. The fan is mounted on the fan holder using a number of screws. The structure can mount the fan to the heat sink, but a problem is that complexities arise when installing the fan holder to the heat sink usingmultiple screws.
What is needed, therefore, is a heat dissipation device incorporating a fan holder easily mounted to a heat sink thereof.
SUMMARY OF INVENTION
A heat dissipation device in accordance with a preferred embodiment of the present invention comprises a heat sink including a heat conducting portion and a plurality of fins extending from the heat conducting portion. The heat conductingportion has a base portion for contacting a heat generating device, and two wing portions extending from the base portion. The heat sink has two slits extending through two opposite sides thereof. A fan holder having a fan mounted thereon is attachedto a face of the heat sink. The fan holder comprises two brackets each having a rib engaged in a corresponding slit of the heat sink to thereby attach the fan holder to the heat sink, and a faceplate having the fan thereon. The faceplate has an earscrewed to a corresponding wing portion of the heat sink and a tab extending upwardly beyond a top end of the heat sink.
Other advantages and novel features will become more apparent from the following detailed description of preferred embodiments when taken in conjunction with the accompanying drawings, in which:
BRIEF DESCRIPTION OF DRAWINGS
Many aspects of the present apparatus and method can be better understood with reference to the following drawings. The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustratingthe principles of the present apparatus and method. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views.
FIG. 1 is an exploded, isometric view of a heat dissipation device in accordance with a preferred embodiment of the present invention;
FIG. 2 is an assembled view of a fan holder and a heat sink shown in FIG. 1; and
FIG. 3 is an assembled view of FIG. 1, but from a different aspect.
Reference will now be made to the drawings to describe the present invention in detail.
FIGS. 1 illustrates a heat dissipation device in accordance with a preferred embodiment of the present invention. The heat dissipation device comprises a heat sink 10, a fan holder 20 located aside the heat sink 10, and a fan 30 mounted on thefan holder.
The heat sink 10 is integrally extruded from metal, and comprises a heat conducting portion and a plurality of fins extending from the heat conducting portion. The heat conducting portion comprises a base portion 110 having a bottom face forcontacting a heat-generating electronic device such as a CPU, and two wing portions 130 extending upwardly and outwardly from a central portion of the base portion 110 to two opposite lateral side portions of the heat sink 10. The two wing portions 130divide the fins into three fin units: two first fin units located between the wing portions 130 and the base portion 110 and a second fins unit located between the two wing portions 130. The two first fin units comprise a plurality of parallel firstfins 121 horizontally extending outwardly from the wing portions 130 and parallel to the base portion 110. The second fins unit comprises a plurality of parallel second fins 141 longitudinally extending upwardly from the two wing portions 130. Thesecond fins 141 are perpendicular to the first fins 121 of the first fin units. At a front face of the heat sink 10, two threaded holes 131 are defined in the two wing portions 130 at a level. Two slits 150 are defined in two opposite lateral sides andlocated adjacent to the front face of the heat sink 10. Each slit 150 is defined in an outmost second fin 141 and outmost ends of a plurality of first fins 121 of a corresponding first fins unit.
The fan holder 20 comprises two brackets 200 attached to the two lateral sides of the front face of the heat sink 10. Each bracket 200 comprises a main body 210. A substantially C-shaped fixing faceplate 220 and a positioning rib 230perpendicularly extend from opposing lateral edges of the main body 210, respectively. The faceplate 220 comprises a tab 221 and an ear 223 at upper and lower parts thereof, respectively. An indentation (not labeled) is defined between the tab 221 andthe ear 223. A thread aperture 225 is defined in each of the tab 221 and the ear 223. Above the thread aperture 225 in the ear 223, a through hole 227 is defined therein.
Referring to FIG. 2, in assembly the fan holder 20 to the heat sink 10. The ribs 230 of the brackets 200 of the fan holder 20 are inserted in corresponding slits 150 of the heat sink 10. The faceplates 220 of the brackets 200 are located on thefront face of the heat sink 10 and are fixed to the front face by two screws 250 passing through the through hole 227 of the ears 223 of the faceplate 220 and screwing into the threaded holes 131 of the heat sink 10. In this way the two brackets 200 arefixed to the heat sink 10 with the two faceplates 220 thereof extending toward each other. In this case, the tabs 221 extend upwardly beyond an upper end of the heat sink 10.
Referring to FIGS. 1-3, the fan 30 comprises a rectangular frame 310 and a blades unit 330 located in the frame 310. The frame 310 defines four orifices 311 in four corners corresponding to the thread apertures 225 of the faceplates 220 of thebrackets 200 of the fan holder 20. Four screws 350 are engaged in the orifices 311 of the frame 310 and screwed in the thread apertures 225 of the faceplates 220 to thereby fasten the fan 30 to the front face of the heat sink 10 with the an upperportion of the fan 30 extending upwardly beyond the upper end of the heat sink 10.
It is believed that the present embodiments and their advantages will be understood from the foregoing description, and it will be apparent that various changes may be made thereto without departing from the spirit and scope of the invention orsacrificing all of its material advantages, the examples hereto described merely being preferred or exemplary embodiments of the invention.
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Field of SearchWith cooling means
With air circulating means
Fan or blower
With heat exchanger unit
With heat sink or cooling fins
Change of physical state
With heat exchanger unit
With cold plate or heat sink
With cooling fins
Through component housing
For active solid state devices
For integrated circuit
Circuit board mounted
Air cooled, including fins
Including liquid heat exchange medium
Cooling electrical device
Mechanical gas pump
Heating or cooling means and gas pump in housing
With injector-type gas pump
Verging gas flow
Radial flow through annular heating or cooling means
Single inlet, plural outlets
With cooling or fluid feeding, circulating or distributing
With heat sink
For plural devices
With discrete components
With electrical isolation means
Devices held in place by clamping
Device held in place by clamping
INCLUDING HEAT INSULATION OR EXCHANGE MEANS (E.G., FINS, LAGGING, ETC.)
Working fluid on at least one side of heat exchange wall
Casing with mounting means
Casing having multiple parts releasably clamped (e.g., casing seal, etc.)
INDEPENDENT, HEADED, APERTURE PASS-THROUGH FASTENER
Having filaments constructed from coated, laminated, or composite material
For cooperating with aperture in supporting structure or structure-to-be-secured
Looping or straddling